SAN FRANCISCO — Twitter announced it has finished rolling out overhauled pages crafted to boost the appeal of the message-sharing service to users around the world. “At the very core there are fewer places you have to click and less you...

SAN FRANCISCO – At five years old, Twitter is just starting to change the world. Jack Dorsey fired off the first tweets on March 21, 2006, an automated “just setting up my twttr” message which he followed with the first...